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Old 04-02-2014, 12:18 AM   #1
aliga8er
LQ Newbie
 
Registered: Feb 2013
Posts: 17

Rep: Reputation: Disabled
Unable to debug multi-threaded application on gdb


Hello,

I am trying to debug a multi-threaded application for the first time. My specifications are ubuntu 13.10 and gdb 7.6.1.

The warning that I am getting is :

warning: Unable to find libthread_db matching inferior's thread library, thread debugging will not be available.

I read on a different website that GDB needs a version of libthread_db.so.1 that matches your libpthread.so.0, and is not finding such version.

Therefore, My libthread_db is in the path /lib/x86_64-linux-gnu/libthread_db.so.1 and the inferior thread library is in path /lib/x86_64-linux-gnu/libpthread.so.0

But How can I match these library versions? If that is the problem

Awaiting for your response
 
Old 04-02-2014, 05:37 AM   #2
aliga8er
LQ Newbie
 
Registered: Feb 2013
Posts: 17

Original Poster
Rep: Reputation: Disabled
I have solved this problem.

The problem was that gdb was not able to find and load both libpthread.so.0 and libthrea_db.so.1.

Therefore, create a .gdbinit in your $HOME directory and add the following lines in it

set auto-load safe-path /
set libthread-db-search-path /lib/x86_64-linux-gnu (64-bit users)
set env LD_PRELOAD /lib/x86_64-linux-gnu/libpthread.so.0 (64-bit users)


Hope it helps to the person facing a similar problem.
 
  


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